Abstract:
A piezoelectric element (20) is attached to a vibration member (10). A plurality of electrodes (22) are two-dimensionally arranged on one surface of the piezoelectric element (20) so as to be spaced apart from each other. A supporting frame (40) supports an edge of the vibration member (10). A control unit (50) inputs an independent driving signal to each of the plurality of electrodes (22). Thus, a large output can be obtained with a resonance frequency depending on what signal is input to which electrode (22). For example, the piezoelectric element (20) is a resin film that is formed of a high molecular material indicating a piezoelectric property.
Abstract:
An electronic apparatus (100) includes a first detachable speaker unit (120) including a first speaker having a relatively high directivity, and a second detachable speaker unit (130) including a second speaker having a relatively low directivity. The electronic apparatus (100) further includes a body unit (an electronic apparatus body (110)) provided with a slot (113) in which any one of the first detachable speaker unit (120) and the second detachable speaker unit (130) is detachably installed therein in an alternative way, and a control unit that is provided in the body unit and controls the first and second speakers.
Abstract:
A second housing 200 is capable of moving in a direction in which the second housing covers one surface of a first housing 100. Oscillating elements of an oscillating element group 400 are arranged in a matrix and oscillate sound waves outward from the one surface of the first housing 100. A control unit controls the plurality of oscillating elements. A sound wave sensor constitutes the same matrix as the plurality of oscillating elements and detects sound waves having a specific wavelength. The detection results of the sound wave sensor are output to the control unit. A frame body holds the plurality of oscillating elements and the sound wave sensor. The control unit oscillates sensor sound waves having a specific wavelength outward from at least one of the oscillating elements. The control unit determines that the second housing 200 covers the one surface of the first housing 100 when the sound wave sensor detects the sound waves having the specific wavelength.
Abstract:
Provided is an oscillator including a piezoelectric vibrator (10), a vibration member (20) that constrains the piezoelectric vibrator (10) on one surface thereof, an elastic member (40) that is provided on one surface of the vibration member (20) or the other surface opposite to one surface and provided so as to be located between edges of the piezoelectric vibrator (10) and the vibration member (20) when seen in a plan view, a fixing member (42) that is provided on one surface or the other surface of the vibration member (20) and provided so as to be located between the piezoelectric vibrator (10) and the elastic member (40) when seen in a plan view, and a supporting member (30) that supports the vibration member (20) through the elastic member (40) and the fixing member (42).
Abstract:
A mobile phone (100) detects at least a direction of an utterance position of a user from the voice input to a plurality of microphones (121, 122) and controls an output direction of a voice out of a speaker unit (110) to match the detected utterance position. Accordingly, it is possible to provide sound with sufficient volume only for a specific user without causing noise in the neighborhood. The microphones may form a matrix together with piezoelectric vibrators that form a speaker unit, or may be formed separately from the speaker unit.
Abstract:
[PROBLEM TO BE SOLVED] Even when a shock due to a fall or the like is received, a piezoelectric element can be made resistant to damage, and the flatness of a frequency sound pressure characteristic can be improved. [SOLUTION] An outer periphery portion of a lower surface of a circular support plate 2, made of resin, is fixed to an upper surface of a ring-shaped frame 1. A circular through hole 3 is provided in the center portion of the support plate 2. An outer periphery portion of a lower surface of a circular metal plate 4 is fixed to a portion of an upper surface of the support plate 2 positioned at the circumference of the through hole 3. A groove 6 is provided in a ring shape and positioned inward from an outer periphery portion of an upper surface of the metal plate 4. A shock absorbing member 7, made of elastic materials such as a carbon-based material and poly urethane, is provided in the groove 6 of the metal plate 4. A piezoelectric element 8 is provided on a portion of the upper surface of the metal plate 4 positioned inward from the shock absorbing member 7, and a portion of an upper surface of the shock absorbing member 7 positioned on an inner periphery portion of the shock absorbing member 7 and at a circumference of the portion of the upper surface of the metal plate 4. Then, as a result of the presence of the shock absorbing member 7, even when a shock due to a fall or the like is received, the piezoelectric element 8 can be made resistant to damage, and the flatness of a frequency sound pressure characteristic can be improved.
Abstract:
Provided is an oscillator (100) including a piezoelectric body (70) that has a plurality of protrusions (72) on one surface thereof, a plurality of electrodes (80) that are respectively provided on the plurality of protrusions (72) so as to be separated from each other, and a plurality of electrodes (82) that are provided on the other surface opposite to the one surface of the piezoelectric body (70) so that each of the electrodes faces only one electrode (80). Thus, it is possible to prevent variation in acoustic characteristics from occurring. Therefore, the oscillator capable of improving the acoustic characteristics of an electronic device is provided.
Abstract:
There is provided an electroacoustic transducer including: an oscillation device (10) that outputs a sound wave (30) from a first vibrating surface, and outputs a sound wave (32), having an opposite phase to that of the sound wave (30), from a second vibrating surface which is opposite to the first vibrating surface; a waveguide (40) that is provided on the first vibrating surface and that includes an open end (46); a waveguide (50) that is provided on the second vibrating surface, and includes an open end (56) which faces the same direction as the open end (46); and a sound wave filter (80) that is provided in the waveguide (50) and attenuates the sound wave (32).
Abstract:
In an electro-acoustic transducer 100 which is an oscillator device, a flat piezoelectric film 120 that moves expansively and contractively through the application of an electric field is disposed on at least one surface of a flat elastic member 110 in which a plurality of holes 111 penetrate a principal surface thereof. Since the stiffness of the elastic member 110 is adjusted by the holes 111, the stiffness impedance with respect to the piezoelectric film 120 can be matched optimally. Thus, it is possible to suppress the amount of vibration displacement and to complement the conversion efficiency of the piezoelectric film 120.
Abstract:
An electronic apparatus (100) includes an image projection unit that projects an image plane (14): an oscillation device that oscillates an ultrasonic wave (24) for sensors and an ultrasonic wave (26) for an audio reproduction toward the image plane (14): a control unit that controls the oscillation device: and an sound wave detection unit that is connected to the control unit. The sound wave detection unit detects the ultrasonic wave (24) for sensors, which is reflected from the image plane (14). The control unit adjusts a sound pressure of a sound to be reproduced based on detection strength detected by the sound wave detection unit. Accordingly, decreased power consumption in the electronic apparatus can be achieved.